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    Rubber composition
    3.
    发明授权
    Rubber composition 有权
    橡胶组成

    公开(公告)号：US06656992B2

    公开(公告)日：2003-12-02

    申请号：US09433886

    申请日：1999-11-04

    申请人： Naofumi Ezawa ,  Yasuo Fukushima ,  Susumu Shibusawa

    发明人： Naofumi Ezawa ,  Yasuo Fukushima ,  Susumu Shibusawa

    IPC分类号： C08J510

    CPC分类号： C08K9/04 ,  B60C1/0016 ,  C08K3/22 ,  C08K9/06 ,  C08L21/00

    摘要： A rubber composition for a tire tread which comprises (A) a rubber component selected from the group consisting of natural rubber and synthetic diene-based rubbers, (B) 5 to 50 parts by weight per 100 parts by weight of the rubber component of (b1) aluminum hydroxide particles which are treated with a surface treating agent on the surface and have an average diameter of secondary particles D2 of 10 &mgr;m or smaller or (b2) aluminum hydroxide particles which have an average diameter of secondary particles D2 of 0.8 &mgr;m or smaller and a ratio (D2/D1) of the average diameter of secondary particles D2 to an average diameter of primary particles D1 of 1.7 or smaller and (C) 5 to 80 parts by weight per 100 parts by weight of the rubber component of at least one filler selected from carbon black and silica. The rubber composition is used for a tire tread and provides a tire which exhibits improved abrasion resistance while the excellent performance on wet roads and the low fuel consumption exhibited by a tire using a conventional rubber composition containing aluminum hydroxide are maintained.

    摘要翻译： 一种轮胎胎面用橡胶组合物，其包含（A）选自天然橡胶和合成二烯类橡胶的橡胶成分，（B）相对于（100）重量份橡胶成分为（〜 b1）在表面用表面处理剂处理并具有10μm以下的二次粒子D2的平均直径或（b2）二次粒子D2的平均直径为0.8μm的氢氧化铝粒子的氢氧化铝粒子，或 二次粒子D2的平均直径相对于初级粒子D1的平均直径为1.7以下的比（D2 / D1）和（C）为5〜80重量份/ 100重量份的橡胶成分 至少一种选自炭黑和二氧化硅的填料。 橡胶组合物用于轮胎胎面，并且提供了耐磨性提高的轮胎，同时在使用含有氢氧化铝的常规橡胶组合物的轮胎中，在湿路面上的优异性能和低燃料消耗量显示出来。

    Particulate alumina, method for producing particulate alumina and composition containing particulate alumina
    4.
    发明申请
    Particulate alumina, method for producing particulate alumina and composition containing particulate alumina 审中-公开
    颗粒氧化铝，颗粒氧化铝的生产方法和含有颗粒氧化铝的组合物

    公开(公告)号：US20050182172A1

    公开(公告)日：2005-08-18

    申请号：US10500010

    申请日：2002-12-27

    申请人： Katsuhiko Kamimura ,  Susumu Shibusawa

    发明人： Katsuhiko Kamimura ,  Susumu Shibusawa

    IPC分类号： C01F7/02 ,  C01F7/44 ,  C09C1/40 ,  H01L23/15 ,  H01L23/29 ,  H01L23/373 ,  C08K3/18

    CPC分类号： C09C1/407 ,  C01F7/02 ,  C01F7/442 ,  C01P2004/51 ,  C01P2004/52 ,  C01P2004/54 ,  C01P2004/61 ,  C01P2006/12 ,  C01P2006/80 ,  H01L23/15 ,  H01L23/295 ,  H01L23/3733 ,  H01L2924/0002 ,  H01L2924/09701 ,  H01L2924/00

    摘要： Particulate alumina has a mean particle size corresponding to a volume-cumulative 50% mean particle size (D50) falling within a range of 3 to 6 μm, has a ratio of D90 to D10 that is 2.5 or less, contains particles that have a particle size of at least 12 μm in an amount of 0.5 mass % or less, particles that have a particle size of 20 μm or more in an amount of 0.01 mass % or less and particles that have a particle size of 1.5 μm or less in an amount of 0.2 mass % or less, and contains an α-phase as a predominant phase. In addition, the particulate alumina has a ratio of longer diameter (DL) to shorter diameter (DS) that is 2 or less and a ratio of D50 to mean primary particle size (DP) that is 3 or less. With these features, the particulate alumina has a narrow particle size distribution profile, causes little wear and exhibits excellent flow characteristics.

    摘要翻译： 颗粒状氧化铝具有对应于落入3〜6μm的范围内的体积累积50％平均粒径（D50）的平均粒径，D90〜D10的比例为2.5以下，含有具有粒子的粒子 至少12μm的大小为0.5质量％以下的粒径为0.01质量％以下的粒径为20μm以上的粒子，以及粒径为1.5μm以下的粒子 0.2质量％以下，含有α相作为主要相。 此外，颗粒状氧化铝的长径比（DL）与较短直径（DS）的比例为2以下，D50与平均一次粒径（DP）的比例为3以下。 通过这些特征，颗粒状氧化铝具有窄的粒度分布分布，几乎没有磨损并且表现出优异的流动特性。